單項(xiàng)選擇題
A.ppmB.g/cm3C.NTUD.g/L
A.30minB.60minC.10minD.20min
A.0-620mg/LB.0-750mg/LC.0-720mg/LD.0-700mg/L
A.610B.710C.810D.910
A.5mlB.10mlC.15mlD.20ml
A.ppmB.g/lC.mg/lD.%
A.CNLB.CALC.READD.ON
A.0-15ppmB.0-25ppmC.1-25ppmD.0-20ppm
A.GB/T16488-1998B.GB/T16488-1996C.GB/T16488-1999D.HJ/T16488-1996
A.1B.3C.2D.5
A.0.05B.0.03C.0.02D.0.01
微信掃一掃關(guān)注公眾號(hào)后聯(lián)系客服
微信掃碼免費(fèi)搜題
